I really enjoyed this, as dark and awful the characters and stories are, but it's written in a really interesting way that address mental health, homelessness, expectations of family, and it's also extremely triggering, like any trigger you can think of. As someone who's really bothered by realistic violence and gore in the torture-porn realm of things, I wasn't bothered by the violence in this, probably because the art style isn't really realistic, particularly when it comes to the gore aspect of the never-ending violence. 
I also had a scroll few some reviews, but I couldn't really find any written by a person of colour - the way this treats Mexican people was interesting, it takes place in the 70s, so the racism is there and isn't really addressed, but the main characters themselves are not overtly racist. It was kinda weird and I'm left feeling a bit unsure as to whether or not it's offensive. 
It's extremely dark and the characters are extremely gritty and flawed to the point where they're basically unenjoyable, but I feel like that's the point here, and I'm extremely curious to see how the development of the characters and their story continues. 
Overall I'd recommend if you're looking for something mysterious and dark, something that leaves you wanting to pick up the next volume right away.